Method and apparatus for transmitting and receiving signal in wireless communication system

Abstract

A method and an apparatus for transmitting and receiving a signal in a wireless communication system disclosed in the present specification operate on the basis of a cell DTX / DRX configuration and a terminal DRX configuration. Specifically, a first field for activation and deactivation of a cell DTX operation and a cell DRX operation is transmitted and received together with a second field for a wake-up indication outside an activation time based on a terminal DRX operation.

Description

Technical Field

[0001] This disclosure relates to a method and apparatus for use in a wireless communication system. Background Technology

[0002] Wireless communication systems are typically being developed to cover a wide range of diverse areas to provide communication services such as audio communication and data communication. Wireless communication is a multiple access system capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power). For example, multiple access systems can include one of the following: Code Division Multiple Access (CDMA), Frequency Division Multiple Access (FDMA), Time Division Multiple Access (TDMA), Orthogonal Frequency Division Multiple Access (OFDMA), and Single Carrier Frequency Division Multiple Access (SC-FDMA). Summary of the Invention

[0003] Technical issues

[0004] The purpose of this disclosure is to provide a signal transmission and reception method and apparatus for efficiently transmitting and receiving signals in a wireless communication system.

[0005] Those skilled in the art will understand that the purposes achievable by using this disclosure are not limited to those specifically described above, and that the above and other purposes achievable by this disclosure will become clearer from the following detailed description.

[0006] Technical solution

[0007] This disclosure provides a method and apparatus for transmitting and receiving signals in a wireless communication system.

[0008] According to one aspect of this disclosure, a method for a user equipment (UE) to transmit and receive signals in a wireless communication system includes the following steps: receiving (i) a configuration for UE discontinuous reception (DRX) operation and (ii) a configuration for cell discontinuous transmission (DTX) operation and cell DRX operation; and receiving downlink control information (DCI) based on UE DRX operation, the DCI including a first field for activation and deactivation for cell DTX operation and cell DRX operation, wherein, outside of the active time based on UE DRX operation, the first field is received together with a second field for wake-up indication.

[0009] According to another aspect of this disclosure, a method for transmitting and receiving signals by a base station (BS) in a wireless communication system includes the following steps: transmitting (i) a configuration for discontinuous reception (DRX) operation of a UE and (ii) a configuration for discontinuous transmission (DTX) operation of a cell and a cell DRX operation, and transmitting downlink control information (DCI) based on the UE DRX operation, the DCI including a first field for activation and deactivation for the cell DTX operation and the cell DRX operation, wherein, outside of the active time based on the UE DRX operation, the first field is transmitted together with a second field for a wake-up indication.

[0010] In another aspect of this disclosure, an apparatus, a processor, and a storage medium are provided for performing signal transmission and reception methods.

[0011] The device may include an autonomous vehicle that can communicate with at least a UE, a network, and another autonomous vehicle besides the communication device.

[0012] The above aspects of this disclosure are merely some preferred embodiments of this disclosure, and various embodiments reflecting the technical features of this disclosure can be derived and understood by those skilled in the art from the following detailed description of this disclosure.

[0013] Beneficial effects

[0014] According to one embodiment of this disclosure, when transmitting and receiving signals between communication devices, signals can be transmitted and received more efficiently based on operations different from those in the prior art.

[0015] Those skilled in the art will understand that the effects achievable through this disclosure are not limited to those specifically described above, and that other advantages of this disclosure will become clearer from the following detailed description taken in conjunction with the accompanying drawings. Attached Figure Description

[0016] Figure 1 The diagram illustrates the structure of a radio frame.

[0017] Figure 2 The diagram illustrates the resource grid during the time slot duration.

[0018] Figure 3 The diagram illustrates a self-contained time slot structure.

[0019] Figure 4 and Figure 5 This is a diagram illustrating a method for transmitting and receiving signals according to an embodiment of the present disclosure.

[0020] Figures 6 to 9 An apparatus according to an embodiment of the present disclosure is illustrated. Detailed Implementation

[0021] The following technologies can be used in various wireless access systems such as Code Division Multiple Access (CDMA), Frequency Division Multiple Access (FDMA), Time Division Multiple Access (TDMA), Orthogonal Frequency Division Multiple Access (OFDMA), and Single Carrier Frequency Division Multiple Access (SC-FDMA). CDMA can be implemented as radio technologies such as Universal Terrestrial Radio Access (UTRA) or CDMA2000. TDMA can be implemented as radio technologies such as Global System for Mobile Communications (GSM), General Packet Radio Service (GPRS), and Enhanced Data Rate GSM Evolution (EDGE). OFDMA can be implemented as radio technologies such as IEEE 802.11 (Wireless Fidelity (WiFi)), IEEE 802.16 (Global Microwave Access Interoperability (WiMAX)), IEEE 802.20, and Evolved UTRA (E-UTRA). UTRA is part of the Universal Mobile Telecommunications System (UMTS). The 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) is part of Evolved UMTS using E-UTRA (E-UMTS), and LTE-Advanced (LTE-A) is an evolution of 3GPP LTE. 3GPP New Radio or New Radio Access Technology (NR) is an evolution of 3GPP LTE / LTE-A.

[0022] For clarity, this disclosure will be described in the context of 3GPP communication systems (e.g., LTE and NR), which should not be construed as limiting the spirit of this disclosure. LTE refers to technologies beyond 3GPP TS 36.xxx version 8. Specifically, LTE technologies beyond 3GPP TS 36.xxx version 10 are referred to as LTE-A, and LTE technologies beyond 3GPP TS 36.xxx version 13 are referred to as LTE-A pro. 3GPP NR is a technology beyond 3GPP TS 38.xxx version 15. LTE / NR may be referred to as a 3GPP system. “xxx” specifies the technical specification number. LTE / NR may be collectively referred to as a 3GPP system. Background techniques, terms, abbreviations, etc., as used herein refer to technical specifications published prior to this disclosure. For example, the following documents may be referenced.

[0023] 3GPP NR

[0024] -38.211: Physical Channel and Modulation

[0025] -38.212: Multiplexing and Channel Coding

[0026] -38.213: Physical layer procedures used for control

[0027] -38.214: Physical layer procedures used for data

[0028] -38.300: General description of NR and NG-RAN

[0029] -38.331: Radio Resource Control (RRC) Protocol Specification

[0030] Figure 1 The radio frame structure used for NR is shown.

[0031] In NR, UL and DL transmissions are configured on a frame-by-frame basis. Each radio frame is 10ms long and is divided into two 5ms half-frames. Each half-frame is further divided into five 1ms subframes. Subframes are divided into one or more time slots, and the number of time slots in a subframe depends on the subcarrier spacing (SCS). Depending on the cyclic prefix (CP), each time slot includes 12 or 14 OFDM(A) symbols. When using normal CP, each time slot includes 14 OFDM symbols. When using extended CP, each time slot includes 12 OFDM symbols. Symbols can include OFDM symbols (or CP-OFDM symbols) and SC-FDMA symbols (or Discrete Fourier Transform-Extended-OFDM (DFT-s-OFDM) symbols).

[0032] Table 1 exemplarily shows how the number of symbols per slot, the number of slots per frame, and the number of slots per subframe vary according to SCS under normal CP conditions.

[0033] [Table 1]

[0034] Table 2 shows the number of symbols per slot, the number of slots per frame, and the number of slots per subframe in the case of extended CP, depending on the SCS.

[0035] [Table 2]

[0036] In NR systems, different OFDM(A) parameter sets (e.g., SCS, CP length, etc.) can be configured for multiple cells aggregated for a UE. Therefore, the (absolute time) duration of time resources (e.g., subframes, slots, or transmission time intervals (TTI)) consisting of the same number of symbols (for convenience, referred to as time units (TU)) can be configured differently among the aggregated cells.

[0037] In NR, various parameter sets (or SCSs) can be supported to support a wide range of 5G services. For example, a 15kHz SCS can support wide areas in traditional cellular bands, while a 30kHz or 60kHz SCS can support dense urban areas, lower latency, and wide carrier bandwidth. For an SCS of 60kHz or higher, bandwidths greater than 24.25kHz can be supported to overcome phase noise.

[0038] The NR band can be defined by two types of frequency ranges, FR1 and FR2. FR1 and FR2 can be configured as shown in Table 3 below. FR2 can be millimeter wave (mmW).

[0039] [Table 3]

[0040] Figure 2 This shows the resource grid during the duration of a time slot.

[0041] A time slot comprises multiple symbols in the time domain. For example, a time slot may contain 14 symbols in normal CP and 12 symbols in extended CP. A carrier comprises multiple subcarriers in the frequency domain. A resource block (RB) can be defined by multiple (e.g., 12) consecutive subcarriers in the frequency domain. Multiple RB interleavings (simply called interleavings) can be defined in the frequency domain. An interleaving m∈{0, 1, ..., M-1} can consist of (common) RBs {m, M+m, 2M+m, 3M+m, ...}. M represents the number of interleavings. A bandwidth portion (BWP) can be defined by multiple consecutive (physical) RBs ((P)RBs) in the frequency domain and corresponds to a set of parameters (e.g., SCS, CP length, etc.). A carrier may include up to N (e.g., five) BWPs. Data communication can be performed in active BWPs, and only one BWP can be enabled for a UE. Individual elements in a resource grid can be called resource elements (REs) and can be mapped to a complex symbol.

[0042] In a wireless communication system, the UE receives information from the BS in the downlink (DL) and transmits information to the BS in the uplink (UL). The information exchanged between the BS and the UE includes data and various control information, and various physical channels / signals exist depending on the type / purpose of the information exchanged. Physical channels correspond to a set of resource elements (REs) carrying information originating from higher layers. Physical signals correspond to a set of REs used by the physical layer but not carrying information originating from higher layers. Higher layers include the Media Access Control (MAC) layer, Radio Link Control (RLC) layer, Packet Data Convergence Protocol (PDCP) layer, Radio Resource Control (RRC) layer, etc.

[0043] DL physical channels include the Physical Broadcast Channel (PBCH), Physical Downlink Shared Channel (PDSCH), and Physical Downlink Control Channel (PDCCH). DL physical signals include the DL Reference Signal (RS), Primary Synchronization Signal (PSS), and Secondary Synchronization Signal (SSS). DL RS includes the Demodulation Reference Signal (DM-RS), Phase Tracking Reference Signal (PT-RS), and Channel State Information Reference Signal (CSI-RS). UL physical channels include the Physical Random Access Channel (PRACH), Physical Uplink Shared Channel (PUSCH), and Physical Uplink Control Channel (PUCCH). UL physical signals include UL RS. UL RS includes DM-RS, PT-RS, and Sounding Reference Signal (SRS).

[0044] Figure 3 An example of a self-contained time slot structure is shown.

[0045] In NR systems, frames have a self-contained structure where the DL control channel, DL or UL data, and UL control channel can all be contained within a single time slot. For example, the first N symbols in a time slot (hereinafter, the DL control region) can be used to transmit the DL control channel, and the last M symbols in the time slot (hereinafter, the UL control region) can be used to transmit the UL control channel. N and M are integers greater than or equal to 0. The resource region between the DL control region and the UL control region (hereinafter, the data region) can be used for either DL data transmission or UL data transmission. For example, consider the following configuration. The parts are listed in chronological order.

[0046] In this disclosure, the base station (BS) may be, for example, a gNode B (gNB).

[0047] UL physical channel / signal

[0048] (1) PUSCH

[0049] The PUSCH can carry UL data (e.g., Uplink Shared Channel (UL-SCH) transport block (TB)) and / or Uplink Control Information (UCI). The PUSCH can be transmitted based on a Cyclic Prefix Orthogonal Frequency Division Multiplexing (CP-OFDM) waveform or a Discrete Fourier Transform Extended OFDM (DFT-s-OFDM) waveform. When the PUSCH is transmitted based on a DFT-s-OFDM waveform, the UE can transmit the PUSCH by applying transform precoding. For example, when transform precoding is not allowed (e.g., when transform precoding is disabled), the UE can transmit the PUSCH based on a CP-OFDM waveform. When transform precoding is allowed (e.g., when transform precoding is enabled), the UE can transmit the PUSCH based on either a CP-OFDM waveform or a DFT-s-OFDM waveform. PUSCH transmissions can be dynamically scheduled by PDCCH (dynamic scheduling) or semi-statically scheduled by higher-layer signaling (e.g., RRC signaling) (and / or Layer 1 (L1) signaling (e.g., PDCCH)) (Configured Scheduling (CS)). Therefore, in dynamic scheduling, PUSCH transmissions can be associated with PDCCH, while in CS, PUSCH transmissions may not be associated with PDCCH. CS can include PUSCH transmissions based on Type 1 Configuration Certification (CG) and PUSCH transmissions based on Type 2 CG. For Type 1 CG, all parameters for PUSCH transmissions can be signaled by higher layers. For Type 2 CG, some parameters for PUSCH transmissions can be signaled by higher layers, while the rest can be signaled via PDCCH. Essentially, in CS, PUSCH transmissions may not be associated with PDCCH.

[0050] (2) PUCCH

[0051] PUCCH can carry UCI. UCI includes the following information.

[0052] - Scheduling Request (SR): SR is information used to request UL-SCH resources.

[0053] - Hybrid Automatic Repeat Request Acknowledgment (HARQ-ACK): HARQ-ACK is a received signal in response to DL signals (e.g., PDSCH, SPS release PDCCH, etc.). HARQ-ACK responses can include affirmative ACK (ACK), negative ACK (NACK), DTX (discontinuous transmission), or NACK / DTX. HARQ-ACK can be used interchangeably with A / N, ACK / NACK, and HARQ-ACK / NACK. HARQ-ACK can be generated based on TB / CBG.

[0054] - Channel State Information (CSI): CSI is feedback information about the DL channel. CSI includes Channel Quality Indicator (CQI), Rank Indicator (RI), Precoding Matrix Indicator (PMI), Precoding Type Indicator (PTI), etc.

[0055] DL physical channel / signal

[0056] (1) PDSCH

[0057] PDSCH carries DL data (e.g., DL Shared Channel Transport Block (DL-SCH TB)). TBs are encoded into codewords (CWs) and then transmitted after scrambling and modulation. Each CW comprises one or more code blocks (CBs). One or more CBs can be grouped into a code block group (CBG). Depending on the cell configuration, PDSCH can carry up to two CWs. Scrambling and modulation can be performed on each CW, and the modulation symbols generated from each CW can be mapped to one or more layers. Each layer can be pre-coded and mapped to resources along with DMRS and transmitted on the corresponding antenna port. PDSCH can be dynamically scheduled by PDCCH (dynamic scheduling). Alternatively, PDSCH can be semi-statically scheduled based on higher-layer (e.g., RRC) signaling (and / or Layer 1 (L1) signaling (e.g., PDCCH)) (configured scheduling (CS)). Therefore, in dynamic scheduling, PDSCH transmission is accompanied by PDCCH, while in CS, PDSCH transmission may not be accompanied by PDCCH. CS may include semi-persistent scheduling (SPS).

[0058] (2) PDCCH

[0059] The PDCCH carries downlink control information (DCI). For example, the PDCCH (i.e., DCI) can carry: the transmission format and resource allocation of the DL-SCH; frequency / time resource allocation information for the uplink shared channel (UL-SCH); paging information for the paging channel (PCH); system information for the DL-SCH; time / frequency resource allocation information for higher-layer control messages such as random access responses (RARs) transmitted on the PDSCH; power control commands; and information about SPS / CS activation / deactivation. Various DCI formats can be provided based on the information in the DCI.

[0060] Discontinuous Receive (DRX) Operation

[0061] While performing the procedures and / or methods described / presented above, the UE may perform DRX operation. A UE configured with DRX can reduce power consumption by discontinuously receiving DL signals. DRX can be performed in the RRC_IDLE, RRC_INACTIVE, and RRC_CONNECTED states. DRX is used for discontinuous reception of paging signals in the RRC_IDLE and RRC_INACTIVE states. The DRX performed in the RRC_CONNECTED state (RRC_CONNECTED DRX) will now be described below.

[0062] Figure 4 This is a diagram illustrating the DRX loop (RRC_CONNECTED state).

[0063] Reference Figure 4 The DRX cycle includes an on-duration period and a DRX opportunity. The DRX cycle defines the time interval during which the on-duration period repeats periodically. The on-duration period is the time period during which the UE monitors for and receives the PDCCH. When DRX is configured, the UE performs PDCCH monitoring during the on-duration period. When any PDCCH is successfully detected during the PDCCH monitoring period, the UE operates an inactive timer and remains in a wake-up state. On the other hand, when no PDCCH is successfully detected during the PDCCH monitoring period, the UE enters a sleep state at the end of the on-duration period. Therefore, when the procedures and / or methods described / proposed above are performed, if DRX is configured, PDCCH monitoring / reception can be performed discontinuously in the time domain. For example, in this disclosure, if DRX is configured, the PDCCH reception timing (e.g., time slots with a PDCCH search space) can be configured discontinuously according to the DRX configuration. Conversely, when the procedures and / or methods described / proposed above are performed, if DRX is not configured, PDCCH monitoring / reception can be performed continuously in the time domain. For example, in this disclosure, if DRX is not configured, the timing of PDCCH reception can be configured continuously (e.g., time slots with PDCCH search space). Regardless of whether DRX is configured, PDCCH monitoring can be limited to the time period configured as a measurement interval.

[0064] Table 4 describes UE operations related to DRX (in the RRC_CONNECTED state). Referring to Table 4, DRX configuration information is received via higher-layer (RRC) signaling, and DRX is enabled / disabled by DRX commands from the MAC layer. Once DRX is configured, the UE can discontinuously perform PDCCH monitoring while executing the procedures and / or methods described / presented in this disclosure, such as... Figure 4 As shown.

[0065] [Table 4]

[0066] MAC-CellGroupConfig includes the configuration information required to configure MAC parameters for a cell group. MAC-CellGroupConfig may also include DRX configuration information. For example, MAC-CellGroupConfig may include the following information when defining a DRX.

[0067] The value of -drx-OnDurationTimer defines the length of the initial duration of the DRX loop.

[0068] The value of -drx-InactivityTimer defines the length of time the UE remains in a wake-up state after a PDCCH timing indicating the initial UL or DL ​​data is detected.

[0069] The value of -drx-HARQ-RTT-TimerDL defines the length of the maximum duration from the initial transmission of DL to the retransmission of DL.

[0070] The value of -drx-HARQ-RTT-TimerDL defines the maximum duration from receiving permission for the initial transmission of DL to receiving permission for a retransmission of UL.

[0071] -drx-LongCycleStartOffset: Defines the duration and start time of the DRX loop.

[0072] -drx-ShortCycle (optional): Defines the duration of a short DRX cycle.

[0073] When at least one of drx-OnDurationTimer, drx-InactivityTimer, drx-HARQ-RTT-TimerDL, or drx-HARQ-RTT-TimerDL is running, the UE performs PDCCH monitoring at each PDCCH timing while remaining in the wake-up state.

[0074] 1. Community-specific DTX-DRX operation for energy saving

[0075] The above content can be applied in conjunction with the methods proposed in this disclosure (described later). Alternatively, the content can illustrate the technical features of the methods proposed in this disclosure.

[0076] Furthermore, the following methods can be equally applied to the aforementioned NR systems (licensed bands) or shared spectrum. Therefore, it is evident that the terminology, expressions, and structure in this document can be modified to suit the system in order to implement the technical concepts of this disclosure in the corresponding system.

[0077] Energy efficiency in network base stations (BSs) can contribute to building environmentally friendly networks by reducing carbon emissions and lowering the operating expenses (OPEX) of communication service providers, and has therefore been considered an important issue in wireless communication systems, including those within 3GPP. Specifically, due to the higher transmission rates required by the introduction of 5G communications, BSs need to include more antennas and provide services through wider bandwidths and frequency bands. According to recent research, this results in energy costs for BSs reaching up to 20% of total OPEX. Due to this increased interest in energy efficiency in BSs, a new research project entitled "Research on Network Energy Efficiency" was approved in 3GPP NR Release 18.

[0078] Specifically, in the corresponding project, the following enhancement technologies were considered to improve the energy-saving capabilities of the BS in both transmission and reception.

[0079] - How to achieve more efficient operation in time, frequency, space and power domains, using one or more network power saving techniques, dynamically and / or semi-statically, and with finer-grained adaptation for transmission and / or reception, with potential support / feedback and potential UE assistance information from the UE.

[0080] Specifically, this specification proposes a method and DCI format for activating / deactivating cell DTX / DRX configurations on a cell or cell group basis when the BS performs cell discontinuous transmission (DTX) / discontinuous reception (DRX) operations in the open / close interval mode for energy saving.

[0081] When a UE enters connected mode after initial connection to a BS, it needs to continuously monitor the PDCCH to check for scheduled transmissions for the UE in each configured search space (SS). However, when the scheduled transmission is not always present, the UE's battery may be rapidly depleted due to unnecessary PDCCH monitoring operations. Therefore, the BS can configure Connected Mode Discontinuous Receive (C-DRX), which achieves power savings for the UE by configuring the periods during which PDCCH monitoring is required (on duration) and the periods during which it is not required (off duration). From the BS's perspective, the UE's C-DRX can also contribute to Energy Savings (ES). During the corresponding UE's C-DRX off period, the BS does not need to send PDCCH to a specific UE, so resources can be used for other purposes, and ES benefits can be obtained through DTX / DRX. However, the UE can transmit without restriction during the off period using pre-configured resources (e.g., SR, PUCCH, or CG-PUSCH), so the BS needs to wait for UL reception from the UE, which can be sent at any time or not at all. C-DRX is configured to be UE-specific. The DRX cycle or on / off cycle is not aligned among UEs within the cell. Therefore, when the UE’s on duration is configured in TDM format, the BS needs to perform PDCCH transmission during each on duration, which may result in no sleep, making it difficult to expect ES benefits.

[0082] Cell-specific DTX / DRX operations allow the BS to shut down transmission / reception for a specific time period. Restricted DTX / DRX can be used, which only allows transmission / reception of specific signals / channels. This specification proposes a method for power saving for the BS. A method for operating the UE for each time interval when cell DTX / DRX is combined with the UE's DRX operations within the cell is proposed. For simplicity, the method and operation of combining cell DTX / DRX with the UE's connection-mode DRX (C-DRX) operations are mainly described; however, the operations described herein can be equivalently applied and extended to other UE DRX operations (e.g., idle-mode DRX) and C-DRX.

[0083] In this disclosure, when the BS operates in NES mode for the ES, this can mean, for example, that the BS pre-configures multiple shutdown durations (the BS's DTX duration) to shut down the transmission of a specific DL signal within a specific time period, and dynamically instructs one of the shutdown durations to indicate that the corresponding DL signal will not be transmitted within a predefined time period, thereby reducing the power consumption of the BS and the UE. When the BS operates in NES mode for the ES, this can mean the following operating mode: in terms of frequency and time domain BWP switching and dynamic RB adaptation, when a specific receive antenna port of the BS is semi-statically or dynamically shut down, the BS does not perform transmission and / or reception through the corresponding antenna port, thereby reducing the power consumption of the BS and the UE. When the BS operates in NES mode for the ES, this can mean the following operating mode: when the antenna port is semi-statically or dynamically shut down in the spatial domain, the BS does not perform transmission and / or reception through the specific receive antenna port of the BS, thereby reducing the power consumption of the BS and the UE.

[0084] The UE periodically performs PDCCH monitoring during the on duration to check for the presence of DL / UL signals to be transmitted / received. When a PDCCH is received during the on duration, the UE performs DL reception or UL transmission according to the instruction. In the case of UL transmission, a UE in sleep mode can wake up and transmit SR regardless of whether data exists in the UL buffer in C-DRX. For a UE in idle mode, the UE can operate in idle mode DRX (I-DRX), periodically monitoring paging and re-entering sleep mode when the UE is not the target UE. Here, UE operation in sleep mode can mean "regardless of the activity time determined by C-DRX" or "even during periods other than the activity time determined by C-DRX". "The time interval including the on duration and the off duration is repeated in C-DRX operation" is defined as a DRX cycle. The length of the DRX cycle is defined as the time from the start of the on interval to the start of the next on interval. There are two types of DRX cycles: long DRX cycles and short DRX cycles. As the length of the DRX cycle increases, if the BS sends a PDSCH immediately after the end of a specific on-duration period of the UE, the BS needs to wait until the next on-duration period of the UE, which may increase latency. The UE does not send P-CSI or SRS during the off-duration period, so the BS can improve resource utilization by allocating resources to other UEs. The BS can also operate in power-saving mode to conserve power during the off-duration period of the UE.

[0085] Long and short DRX cycles can be configured simultaneously. In this case, the long DRX cycle must be configured as an integer multiple of the short DRX cycle (with the same onDurationTimer value). When there is no data activity during the long DRX cycle's on-time duration (e.g., no PDCCH reception), the UE operates with the long DRX cycle. When there is data activity during the long DRX cycle's on-time duration, the UE operates with the short DRX cycle for the period corresponding to drx-ShortCycleTimer, and when there is no data activity during the short DRX cycle's on-time period, the UE switches back to the long DRX cycle and operates. In this case, the start of the on-time duration in the short DRX cycle is determined by the drx-StartOffset and drx-SlotOffet values, as in the long DRX cycle.

[0086] The BS instructs the UE to directly enter DRX sleep mode via the DRX command MAC control element (CE), instead of operating in active mode, until the end of the active duration. In other words, the BS can terminate the UE's active time and immediately enter a DRX cycle. When only a long DRX cycle is configured for the UE, the UE operates only in the long DRX cycle. And when a short DRX cycle is also configured, the UE immediately enters the short DRX cycle mode upon receiving the DRX command MAC CE. When the BS instructs a long DRX command MAC CE, the UE operates in the long DRX cycle mode even if a short DRX cycle is configured.

[0087] The BS can control the start point of a long DRX cycle via the RRC parameter drx-LongCycleStartOffset, with the offset value defined in milliseconds, allowing the long DRX cycle to begin at a slot boundary. The start point of the on-duration can be configured at a slot-level granularity via another RRC parameter, drx-SlotOffset. The start of the on-duration is defined as the relative position of the on-duration by applying a slot offset indicated from the reference point specified by LongCycleStartOffset. The BS can align the on-duration and off-duration of multiple UEs within the cell and use the on-duration and off-duration for ES operations by adjusting the positions of the DRX cycle start point and the on-duration start point using parameters. However, for ES using a dynamic transmit / receive off-duration mode via the BS, a more dynamic offset indication may be required.

[0088] Compared to continuously (e.g., every time slot) monitoring the PDCCH, the UE can perform ES by utilizing C-DRX configuration to wake up only during the on-duration and monitor the presence or absence of the PDCCH sent to the UE. When the BS has no data to transmit in the UE's upcoming on-duration, the BS can save more battery power by sending a WUS before the start of the UE's on-duration, indicating that it does not need to wake up from the on-duration (i.e., it does not need to start the on-duration timer). When there is no data to transmit / receive in the next on-duration of a C-DRX-configured UE, the BS can send a WUS in DCI format 2_6 at a WUS timing configured before the on-duration, thereby indicating to the UE that it does not need to wake up during that on-duration. The UE receiving the WUS instruction can remain in sleep mode without switching to active mode, thus allowing for more ES.

[0089] Cell DTX / DRX operation has a structure similar to that of UE C-DRX and can include active and inactive periods. During active periods, all signals and channels can be transmitted / received without restriction. During inactive periods, transmission / received signals and channels can be disabled, or restricted to specific signals and channels. For example, during inactive periods, only PDCCH transmission or RACH / SR PUCCH reception by the BS can be permitted. Cell DTX / DRX configuration can be configured and activated solely via RRC. Alternatively, some parameters can be configured by RRC, and the remaining parameters can be configured / indicated and activated via L1 / L2 signaling. L1 / L2 signaling can be, for example, (group common) DCI / MAC-CE. Information regarding the location and length of active and inactive periods of cell DTX / DRX can be pre-received and pre-configured via specific RRC parameters. For example, the start point of an active period can be configured by an offset relative to a specific subframe boundary or a specific SFN value. The duration of an active period can be configured via length-related parameters, timers, etc. In this scenario, multiple candidates for parameters or timers can be pre-configured via RRC signaling, and one of these candidates can be indicated upon activation via L1 / L2 signaling. During the cell DTX / DRX active period, all signals and channels can be transmitted / received without any special transmit / receive restrictions, just like normal BS operation. The duration outside the active period is essentially considered inactive, and transmission / reception can be restricted to pre-configured signals and channels. The BS can gain energy-saving (ES) benefits by performing only minimal transmit / receive operations; therefore, operation during the inactive period of cell DTX / DRX operation can be considered as operation when NES state / mode is enabled.

[0090] [Method #1] Cell / Cell Group DTX / DRX Activation / Deactivation Method via Group Common (GC-) DCI and MAC CE

[0091] Method #1 may include the following methods.

[0092] (1) The method of following the most recently received instructions in GC-DCI and MAC CE

[0093] (2) Method for pre-configuring / pre-receiving instructions to prioritize specific instructions in GC-DCI and MAC CE

[0094] (3) The method of always prioritizing MAC CE instructions when there is no separate configuration / instruction to prioritize a specific instruction.

[0095] i. When both GC-DCI and MAC CE instructions are received simultaneously, follow the method specified in the MAC CE instruction.

[0096] ii. Methods for ignoring GC-DCI instructions when activating or deactivating cell DTX / DRX configuration via MAC CE instructions.

[0097] (4) A method to always prioritize GC-DCI instructions when there is no separate configuration / instruction to prioritize a specific instruction.

[0098] i. When both GC-DCI and MAC CE instructions are received simultaneously, follow the method specified in the GC-DCI instruction.

[0099] ii. A method that ignores received MAC CE indications after activating or deactivating cell DTX / DRX configuration using GC-DCI.

[0100] (5) A method for activating or deactivating the cell DTX / DRX configuration only after receiving the MAC CE following the receipt of the GC-DCI.

[0101] The following is a detailed description of methods (1) to (5) of method #1.

[0102] Unlike UE-specific C-DRX, cell DTX / DRX configurations are typically applied to all UEs within the cell. Therefore, activation / deactivation is not required for each UE. There may be advantages in signaling overhead when activation / deactivation is performed via GC-DCI. However, without HARQ-ACK feedback transmission configured, the BS may not know whether the UE has correctly received the GC-DCI indicating activation or deactivation. This could lead to errors (misalignment) in whether cell DTX / DRX is currently operating or applied between the UE and the BS. On the other hand, signaling overhead increases when activation / deactivation is performed via MAC CE because instructions need to be sent to each UE. However, the UE needs to send HARQ-ACK feedback for the MAC CE instructions, so MAC CE may have a relative advantage over GC-DCI in terms of reliability.

[0103] Activation / deactivation of cell DTX / DRX configurations can be configured via GC-DCI and MAC CE. When both commands can be used for activation / deactivation, it may be necessary to consider whether the UE can follow the command sent via GC-DCI or MAC CE, or whether to prioritize specific commands. First, unless otherwise indicated, the UE can always follow the last command received. For example, the UE receives an activation command for cell DTX / DRX configuration via GC-DCI in time slot #n and performs transmit / receive according to cell DTX / DRX operation. After receiving a deactivation command via MAC CE in time slot #n+4, it can perform deactivation of cell DTX / DRX configuration according to the most recently received command.

[0104] Alternatively, the BS can be pre-configured / pre-instructed to prioritize specific instructions between GC-DCI and MAC CE. For example, when GC-DCI instructions are configured / instructed to take precedence over MAC CE, cell DTX / DRX configurations activated by GC-DCI instructions will not be activated by MAC CE until the configured timer or expiration date expires, and can only be activated by GC-DCI.

[0105] When there is no separate configuration / instruction prioritizing a specific instruction to the UE, a specific indication method can be applied according to a previously predetermined priority. One approach is to always allow MAC CE instructions to take precedence over GC-DCI. When both GC-DCI and MAC CE indications are received simultaneously (or within a specific time interval), the UE can prioritize the MAC CE indication. For example, when GC-DCI includes an activation instruction and MAC CE includes a deactivation instruction, the UE can follow the MAC CE instruction. For cell DTX / DRX configurations activated or deactivated via MAC CE instructions, instructions via GC-DCI are disregarded until a timer or expiration date expires, and the UE can only follow instructions via MAC CE.

[0106] Alternatively, when there is no separate configuration / instruction prioritizing a particular instruction, the GC-DCI instruction can always take precedence. In this case, when both the GC-DCI instruction and the MAC CE instruction are received simultaneously (or within a specific time interval), the UE can prioritize the GC-DCI instruction. MAC CE instructions received after activating or deactivating the cell DTX / DRX configuration using GC-DCI can be disregarded until the timer or validity period of the cell DTX / DRX configuration expires.

[0107] Specifically, after receiving the GC-DCI instruction for activating or deactivating the cell DTX / DRX configuration, it can also receive an additional MAC CE for activating or deactivating the cell DTX / DRX configuration, thereby enabling the activation or deactivation of the applied cell DTX / DRX configuration.

[0108] [Method #2] A method for activating / deactivating UE cell DTX / DRX configuration based on GC-DCI or timer and a method for determining the application time for activation / deactivation.

[0109] Method #2 may include the following methods.

[0110] (1) A method for pre-configuring default or fallback operations when the UE fails to receive GC-DCI (depending on whether the BS always sends GC-DCI at every monitoring moment (MO)).

[0111] A. When the UE does not always monitor GC-DCI instructions for every configured MO (especially during periods of cell DTX inactivity), the method of performing (inactive) operations is based on a timer included in the cell DTX / DRX configuration or by a timer indicated by (inactive) GC-DCI.

[0112] B. A method of not configuring a timer when the UE always monitors GC-DCI instructions for each configured MO.

[0113] C. A method where a timer is configured even when the UE always monitors GC-DCI commands for each configured MO, and the BS enables (de-)activates via GC-DCI before the timer expires (timer value adaptation via DCI is also possible).

[0114] (2) When the UE does not receive the GC-DCI instruction, when the BS sends the GC-DCI instruction multiple times from multiple MOs, when the GC-DCI instruction is received from at least one MO in the pre-configured MO group, even without separately configuring the reference time or application delay, the method of activating / deactivating the cell DTX / DRX configuration based on the last MO in the MO group after a preset time (e.g., 2 time slots).

[0115] (3) A method for receiving multiple candidate (de)activation points from the BS (which can be periodically pre-configured), and when the UE receives a GC-DCI instruction from a specific MO, selecting the nearest candidate (de)activation point among the configured candidate (de)activation points to activate the cell DTX / DRX.

[0116] (4) Typically, in the deactivation cases of methods (2) and (3) above, the deactivation method is applied immediately after the UE receives the GC-DCI instruction.

[0117] The following is a detailed description of methods (1) to (4) of method #2.

[0118] The UE may receive in advance an MO for receiving GC-DCI instructions from the BS to (de)activate the cell DTX / DRX configuration. The BS may or may not always send GC-DCI on the configured MO. The UE may perform GC-DCI monitoring for each configured MO, or may not perform GC-DCI monitoring for certain durations (e.g., during periods of cell DTX inactivity).

[0119] According to 3GPP TS 38.212 and 38.213, when the configured MO does not receive (detect) DCI format 2_7 as GC-DCI, the default operation of the UE is to skip the PO (Paging Opportunity) associated with the MO. If the configured MO does not receive DCI format 2_6, then the default operation can be configured when the MO does not receive GC-DCI. Therefore, the BS can pre-configure whether the UE can skip the on-state duration of the DRX cycle linked to the MO.

[0120] Similarly, for GC-DCI that (de)activates a cell DTX / DRX configuration, a default or fallback operation may need to be defined / configured, depending on whether the BS always sends GC-DCI for each configured MO. Alternatively, a fallback operation may not be necessary when the BS does not always send GC-DCI for each configured MO. For example, if the current cell DTX / DRX is active and operational, and the BS always sends GC-DCI on the configured MO, the default operation can be configured to keep the UE active if the UE does not receive GC-DCI. Alternatively, in the same case, the default operation can be configured to fall back to an inactive state when no GC-DCI is received. As another example, when a cell DTX / DRX configuration is deactivated, if the UE fails to receive GC-DCI on a specific MO, the default operation can be configured to enable the specific cell DTX / DRX configuration. In this case, a specific MO and a specific cell DTX / DRX are committed to / pre-configured. For example, when the BS semi-statically configures the cell DTX / DRX activation mode to the UE, the UE is configured to confirm activation via the activation RD-DCI in the configured MO. However, if the GC-DCI is not received, the UE can assume that it has missed the GC-DCI sent by the BS and can activate and operate the pre-arranged cell DTX or cell DRX configuration.

[0121] When the UE does not always monitor GC-DCI instructions for every configured MO (especially during cell DTX inactivity periods), it may not receive deactivation instructions sent by the BS via GC-DCI. Alternatively, due to the cell DTX inactivity interval configuration, the BS may not be able to send deactivation instructions itself. With this in mind, a timer included in the cell DTX / DRX configuration or a timer via (de)activation of GC-DCI can be configured. In this case, when the configured / indicated timer expires, the active cell DTX / DRX configuration can be deactivated even if the BS does not send GC-DCI (even if the UE does not receive GC-DCI). If the BS explicitly configures a timer in the cell DTX / DRX configuration or indicates a timer via GC-DCI, this implicitly indicates that the BS will not always send GC-DCI for every configured MO. Alternatively, the BS may have already disabled GC-DCI monitoring because the BS does not plan to (de)activate DCI in the near future.

[0122] When the BS configures a timer within the cell's DTX / DRX configuration or directly indicates a timer via GC-DCI, this implicitly configures / instructs the BS to always send GC-DCI for each MO that the BS has configured. Conversely, when the UE is configured to always monitor GC-DCI instructions for each configured MO, the timer can be considered not to be configured / indicated individually. In this case, the UE always follows GC-DCI instructions received from the MO, but if the UE does not receive an MO, the UE can perform the pre-configured default operation as described above.

[0123] Alternatively, even if the UE always monitors the GC-DCI indication for each configured MO, the timer can be configured via cell DTX / DRX configuration or indicated via GC-DCI. In this case, the BS can activate via GC-DCI indication (removal) before the timer expires, and adaptation of the timer value via GC-DCI is also possible. In this case, adapting the timer value can mean pointing to one of the pre-configured candidate timer values ​​(pointing to an index).

[0124] If the UE does not receive a GC-DCI instruction, the BS can send the GC-DCI instruction multiple times from multiple MOs. In this case, a reference time or application delay needs to be determined, which is the time point at which the actual cell DTX / DRX configuration is applied. Even if the BS does not configure a reference time or application delay separately, when the UE receives a GC-DCI instruction from at least one MO in a pre-configured MO group, it can activate or deactivate the cell DTX / DRX configuration based on the last MO in the MO group after a pre-configured time (e.g., two time slots). This method allows the BS to align the start points of activation or deactivation of the cell DTX / DRX configuration even if the timing of GC-DCI reception by UEs within the cell differs. Specifically, in the case of deactivation, the UE can apply deactivation immediately after receiving the GC-DCI, regardless of the timing of the GC-DCI reception.

[0125] More generally, the UE can be pre-configured with multiple candidate (de)activation points (which can be configured periodically), and when the UE receives an activation or deactivation GC-DCI instruction at a specific MO, the UE can activate the cell DTX / DRX at the nearest (de)activation point among the configured candidate (de)activation points. Similarly, in the case of deactivation, the UE can apply deactivation immediately upon receiving the GC-DCI instruction.

[0126] [Method #3] The following method is used to configure the group common DCI field for activating / deactivating the cell DTX / DRX configuration for each UE or for all UEs.

[0127] Method #3 may include the following methods.

[0128] (1) Method for configuring GC-DCI with multiple blocks (with DTX (de)activation indicator field, DRX (de)activation indicator field, timer or (valid) interval field and / or cell DTX / DRX configuration index field)

[0129] A. Depending on the number of serving cells configured for the UE, the location and size of the blocks to be viewed within GC-DCI can differ for each UE.

[0130] B. Cell DTX and cell DRX can be configured separately, so a specific cell can have only DTX configuration or only DRX configuration, and the size of each block that makes up GC-DCI can be changed by the UE. Even when multiple timers and cell DTX / DRX configurations are configured, the block size can vary for each UE.

[0131] C. When cell DTX / DRX deactivation is instructed for a specific cell / cell group, certain fields can be omitted. Alternatively, even if a specific field exists, it can be disregarded. Alternatively, whether a specific field is disregarded can vary depending on whether a timer is configured.

[0132] When the new DCI format for the (de)activation cell DTX / DRX configuration is called DCI format 2_X (e.g., DCI format 2_9), (2) A method for configuring DCI by merging information from DCI format 2_X into the existing DCI format 2_6. A. The method for constructing DCI is as follows: information from DCI format 2_x is appended to 2_6 or the block position of DCI format 2_X is interpreted by adding the offset value of DCI format 2_6 (ps-PositionDCI-2-6). B. A method for configuring DCI format 2_X differently for each cell / cell group and indicating the location of DCI format 2_6 information blocks through separate offset parameter configuration. (3) When configuring DCI by merging information from DCI format 2_X with existing DCI format 2_6, A. A method to additionally configure the MO of DCI format 2_X as the MO of DCI format 2_6 (in this case, the MO of DCI format 2_6 transmits a combination of DCI format 2_6 and DCI format 2_X DCI formats). B. Pre-configured / predefined methods for default operations when only one DCI format (DCI format 2_6 or DCI format 2_X) is transmitted in DCI format 2_6 MO, and for default operations in cases where DCI format 2_X and DCI format 2_6 are not detected because DCI format 2_6 is not always transmitted from the DCI format 2_6 MO configured by the BS. C. When DCI Format 2_X transmitted in DCI Format 2_6 is transmitted with information from DCI Format 2_6 included, the method for configuring each block or wake-up indicator field block separately in the new DCI Format 2_X (in this case, excluding the SCell sleep indicator field or performing the previously committed / configured operation). (4) The new DCI format 2_X allows PDCCH transmission and monitoring during cell DTX inactivity periods (via a specific RNTI / SS configuration) as an exception. The following is a detailed description of methods (1) to (4) of method #3.

[0133] Fields in the group common DCI used to activate / deactivate cell DTX / DRX configurations can be configured per UE or are common to the UE. Essentially, cell DTX and cell DRX configurations can be configured separately, thus requiring separate fields indicating activation / deactivation of the cell DTX configuration and fields for activating / deactivating the cell DRX configuration. Multiple cell DTX / DRX configurations can be configured together (e.g., index #1 = cell DTX configuration #1, index #2 = cell DTX configuration #2, index #3 = cell DRX configuration #3, index #4 = cell DTX and DRX joint configuration #4), and within this configuration, a timer (or duration) for maintaining the (de)activation of each cell DTX / DRX configuration can be configured for each cell. Therefore, the cell DTX (de)activation indication field / cell DRX (de)activation indication field / timer or (effective) interval field / cell DTX / DRX configuration index field can be configured as a block. A corresponding block is mapped for each cell / cell group configured for the UE, and the GC-DCI can include multiple blocks. In this scenario, the number of serving cells configured for each UE can differ, and cell DTX and cell DRX configurations can be configured for each cell. Therefore, each cell may have only a DTX configuration or only a DRX configuration. Consequently, the size of each block constituting the GC-DCI can differ for each UE, and even when multiple timers and cell DTX / DRX configurations are configured, the block size can still differ for each UE. Alternatively, conversely, the number of bits constituting each cell's block is always configured to be constant (e.g., to match a maximum size) and, depending on the configuration of each cell or UE, may utilize all bits within the block or may omit some bits. Whether certain bits within the block are ignored can vary depending on whether timers are configured or whether cell DTX / DRX is deactivated for a specific cell / cell group. For example, when instructing cell DTX / DRX deactivation for a specific cell / cell group, certain fields (fields indicating timer or cell DTX / DRX configuration indices) may be omitted or ignored, even if present in the block, and the DCI can be interpreted accordingly.

[0134] DCI format 2_6 is scrambled with PS-RNTI (Power Saving - Radio Network Temporary Identifier), and the start position of each UE block is determined by the ps-PositionDCI-2-6 parameter. Each UE block includes a wake-up indication field and an S-Cell sleep indication field. When the value of the 1-bit wake-up indication field is 0, the drx-onDurationTimer for the next long DRX cycle is not started; if it is 1, the timer is started. The size of the bitmap in the S-Cell sleep instruction field is determined by the DormancyGroupID configuration. DCI format 2_6 can be transmitted only outside of the UE's DRX active time (depending on UE reception), and its size is determined by sizeDCI-2-6.

[0135] When a new DCI format for (de)activating cell DTX / DRX configuration is referred to as DCI format 2_X, a method can be considered to configure DCI by merging the information of DCI format 2_X with the existing DCI format 2_6, so as not to increase the UE's DCI size budget or the required number of BDs. In this case, considering backward compatibility with existing UEs, DCI can be configured by appending the information of DCI format 2_x to the end of 2_6. Alternatively, the block position of DCI format 2_X can be interpreted by adding the ps-Offset value of DCI format 2_6. In the former case, the UE interprets DCI by considering that the portion after the last block of DCI format 2_6 includes the block used to activate / deactivate cell DTX / DRX configuration. In the latter case, the UE can know the start position of the block used to activate / deactivate cell DTX / DRX configuration by adding the block position offset value of DCI format 2_X to the ps-Offset value indicating the start position of the block within DCI format 2_6. Alternatively, without considering existing UEs, DCI format 2_X can be configured differently for each cell / cell group, and the information of DCI format 2_6 can be configured as a separate offset parameter to indicate the location of the block including the wake-up indication field and the S-cell sleep indication field.

[0136] In this scenario, when configuring DCI by merging information from DCI format 2_X with the existing DCI format 2_6, the MO of DCI format 2_6 can be configured only outside of the DRX activity time of the UE C-DRX, and the MO of DCI format 2_X can be configured regardless of whether it is within or outside of the DRX activity time. With this in mind, the MO of DCI format 2_X is appended to the MO of DCI format 2_6, and in this case, the DCI format as a combination of DCI format 2_6 and DCI format 2_X can be transmitted on the MO of DCI format 2_6. Alternatively, a UE configured with a search space (SS) or set of MOs for the two DCI formats can detect two DCIs with overlapping MOs. Alternatively, the UE can receive two DCI formats in a time-division multiplexing (TDM) manner by shifting one of the two overlapping MOs so that the two MOs do not overlap.

[0137] In the case of DCI format 2_6, DCI format 2_6 is not always transmitted on the configured MO. Therefore, in DCI format 2_6, the MO only transmits one DCI format (DCI format 2_6 or DCI format 2_X), and a default operation can be preconfigured / predefined when neither DCI format 2_X nor DCI format 2_6 is received (or detected). For example, if DCI format 2_6 is not received, the default operation can be configured to not start the drx-onDurationTimer for the next long DRX cycle. When DCI format 2_X is not received, the active cell DTX / DRX configuration for each cell can be configured / defined to remain unchanged.

[0138] When DCI Format 2_X transmitted in the MO of DCI Format 2_6 includes information from DCI Format 2_6, each block or wake-up indication field block in DCI Format 2_X can be included separately. In this case, the S-cell sleep instruction field can be excluded, or a commitment / pre-configuration operation can be performed. PDCCH transmission can be disabled based on the configuration during the cell DTX inactivity period, thus GC-DCI monitoring can be omitted because the BS does not transmit PDCCH and the UE does not expect to receive PDCCH. However, in order to (de)activate the cell DTX / DRX configuration during the inactivity period, DCI Format 2_X can exceptionally allow PDCCH transmission and monitoring even during the cell DTX inactivity period (via a specific RNTI / SS configuration).

[0139] In method #3, the information within a block included in DCI format 2_6 may include individual bits, such as the cell DTX activation / deactivation indicator field, the cell DRX activation / deactivation indicator field, and the timer value field. Alternatively, multiple pieces of information may be jointly encoded into a single state. For example, each block may include the following M states.

[0140] - Status 0: Cell DTX / DRX deactivated. - State 1: Cell DTX mode #1 / Cell DRX mode #1 activated and timer = A, - State 2: Cell DTX mode #2 / Cell DRX mode #2 activated and timer = B, ... - Status M-1: Cell DTX mode #N / Cell DRX mode #N activation and timer = X.

[0141] This joint encoding method can be applied to all information included within a block. For example, when a block contains four pieces of information, all four pieces of information can be jointly encoded and configured into a single state. Alternatively, only three pieces of information can be jointly encoded, where one piece of information consists of a single bit.

[0142] When instructing the UE to activate / deactivate a cell DTX / DRX, information about when the application actually begins can be directly indicated by including it in the DCI. Depending on the configuration, this information can be indicated per block, per block group, or collectively for all blocks. For example, when the K value is indicated as the application time via the DCI, the UE can begin the actual DTX / DRX activation / deactivation from the point K timeslots (or symbols) after the PDCCH reception time (e.g., the timeslot where the PDCCH was received or the start / end symbol of the PDCCH). The PDCCH MO transmitted in DCI format 2_6 can include a monitoring window of a specific length, configured before a specific offset from the cell DTX active period and / or cell DTX inactive period, similar to the MinTimeGap in DCI format 2_6. In this case, the offset value and the length of the monitoring window can be pre-configured from the BS. If a monitoring window exists prior to a specific offset from the cell DTX active period, the MO can be included in the cell DTX inactive period. Therefore, even if the BS has configured all PDCCH reception to be off or to send a specific type (Type 3 CSS) of SS during the inactive period when configuring cell DTX, it may be abnormally allowed to send DCI format 2_X.

[0143] This disclosure is not limited to the transmission and reception of UL and / or DL ​​signals. For example, this disclosure can also be used for direct communication between UEs. The BS in this disclosure can be a concept that includes not only BSs but also relay nodes. For example, the operation of the BS in this disclosure can be performed by the BS, but it can also be performed by a relay node.

[0144] Obviously, examples of the methods proposed above can also be included as implementations of this disclosure, and thus can be considered as proposed methods. The proposed methods can be implemented independently, but can also be implemented as a combination (or merging) of some proposed methods. Rules can be defined such that information regarding the applicability of the proposed methods (or information regarding the rules governing the proposed methods) is reported by the BS to the UE via predefined signals (e.g., physical layer signals or higher layer signals) or by the receiving UE to the receiving UE.

[0145] Implementation example

[0146] Figure 5 This is a flowchart of a signal transmission and reception method according to an embodiment of the present disclosure.

[0147] Reference Figure 5 The implementation of this disclosure can be performed by a UE and may include the following steps: receiving (i) a configuration for UE DRX operation and (ii) a configuration for cell DTX operation and cell DRX operation (S501), and receiving downlink control information (DCI) based on UE DRX operation (S503), the DCI including a first field for activation and deactivation for cell DTX operation and cell DRX operation.

[0148] Other embodiments of this disclosure may be performed by a BS and may include the following steps: sending (i) a configuration for UE DRX operation and (ii) a configuration for cell DTX operation and cell DRX operation (S501), and sending downlink control information (DCI) based on UE DRX operation (S503), the DCI including a first field for activation and deactivation for cell DTX operation and cell DRX operation.

[0149] Apart from Figure 5 In addition to the operations described in Chapter 1, one or more other operations can be performed.

[0150] For example, referring to method #3 (2), information in DCI format 2_X (or DCI format 2_9) including the first field can be merged into DCI format 2_6. DCI format 2_6 and DCI 2_9 are group common DCIs, and each DCI format includes information for one or more UEs. Within a DCI format, information for a specific UE is called a block. The mapping relationship between blocks of DCI format 2_6 and UEs can be received via the RRC parameter ps-PositionDCI-2-6. The mapping relationship between blocks of DCI format 2_X and UEs can be received via the RRC parameter positionInDCI-cellDTRX.

[0151] DCI format 2_6 is received outside the active time associated with the UE's DRX operation. Normally, DCI is received during the active time of the DRX operation, so DCI format 2_X does not need to be received outside of the active time. However, in order to perform cell DTX / DRX operation activation / deactivation outside the active time of the UE's DRX operation, the information in DCI format 2_X can be combined with DCI format 2_6 and transmitted via the MO of DCI format 2_6.

[0152] DCI format 2_6 includes at least one wake-up indication field, so information from DCI format 2_X is received when combined with DCI format 2_6. This means that the first field for activation and deactivation of cell DTX operation and cell DRX operation is received together with the second field for wake-up indication.

[0153] For a UE, the second field includes 1 bit. When both cell DTX operation and cell DRX operation are configured in the UE, the first field may include 2 bits, or when only one of the two is configured, the first field may include 1 bit.

[0154] DCI format 2_X can be received during the active period of UE DRX operation, and therefore, DCI format 2_X information can be received without merging with DCI format 2_6 information. Therefore, it is possible to receive DCI that includes only the first field and excludes the second field.

[0155] Referring to method #3(2)-A, when DCI format 2_6 and DCI format 2_X are merged, the information of DCI format 2_6 can be located first, and then the information of DCI format 2_X can be located. The merged DCI includes information about multiple UEs, so when the block of DCI format 2_X is called the first block and the block of DCI format 2_6 is called the second block, the merged DCI can include the first block after the second block. Each of the first blocks includes a first field, and each of the second blocks includes a second field.

[0156] First information regarding the position of the first block for a specific UE within the first block is received via positionInDCI-cellDTRX. Second information regarding the position of the second block for a specific UE within the second block is received via ps-PositionDCI-2-6.

[0157] All first blocks are located after all second blocks, so the UE can derive the position of the first block by adding the values ​​of the first and second information.

[0158] Configurations for cell DTX and cell DRX operations can be sent from the BS to the UE via the RRC parameter CellDTX-DRX-Config. Configurations for UE DRX operations can be sent from the BS to the UE via the RRC parameter DRX-Config.

[0159] Besides about Figure 5 In addition to the operations described, other operations can also be performed in combination regarding... Figures 1 to 4 The operation described and / or one or more of the operations described in Section 1.

[0160] Examples of using the communication system disclosed herein

[0161] The various descriptions, functions, processes, proposals, methods and / or operation flowcharts of this disclosure can be applied to, but are not limited to, various fields requiring wireless communication / connectivity between devices (e.g., 5G).

[0162] More specific examples will be described below with reference to the accompanying drawings. In the following drawings / descriptions, unless otherwise stated, the same reference numerals denote the same or corresponding hardware blocks, software blocks, or functional blocks.

[0163] Figure 6 An example of a communication system 1 applied to this disclosure is shown.

[0164] refer to Figure 6The communication system 1 applied to this disclosure includes wireless devices, a network (BS), and a network. Wireless devices are devices that perform communication using radio access technology (RAT) (e.g., 5G NR (or new RAT) or LTE), also referred to as communication / radio / 5G devices. Wireless devices may include (but are not limited to) robots 100a, vehicles 100b-1 and 100b-2, extended reality (XR) devices 100c, handheld devices 100d, home appliances 100e, IoT devices 100f, and artificial intelligence (AI) devices / servers 400. For example, vehicles may include vehicles with wireless communication capabilities, autonomous vehicles, and vehicles capable of vehicle-to-vehicle (V2V) communication. In this document, vehicles may include unmanned aerial vehicles (UAVs) (e.g., drones). XR devices may include augmented reality (AR) / virtual reality (VR) / mixed reality (MR) devices and may be implemented in the form of head-mounted displays (HMDs), head-up displays (HUDs) installed in vehicles, televisions (TVs), smartphones, computers, wearable devices, home appliances, digital signage, vehicles, robots, etc. Handheld devices may include smartphones, smart tablets, wearable devices (e.g., smartwatches or smart glasses), and computers (e.g., laptops). Home appliances may include TVs, refrigerators, washing machines, etc. IoT devices may include sensors, smart meters, etc. For example, the BS and network can be implemented as wireless devices, and a particular wireless device 200a can operate as a BS / network node for other wireless devices.

[0165] Wireless devices 100a to 100f can connect to network 300 via BS 200. AI technology can be applied to wireless devices 100a to 100f, and wireless devices 100a to 100f can connect to AI server 400 via network 300. Network 300 can be configured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g., NR) network. Although wireless devices 100a to 100f can communicate with each other via BS 200 / network 300, wireless devices 100a to 100f can also perform direct communication with each other without BS / network intervention (e.g., sidelink communication). For example, vehicles 100b-1 and 100b-2 can perform direct communication (e.g., V2V / Vehicle-to-everything (V2X) communication). IoT devices (e.g., sensors) can perform direct communication with other IoT devices (e.g., sensors) or other wireless devices 100a to 100f.

[0166] Wireless communication / connections 150a, 150b, and 150c can be established between wireless devices 100a to 100f / BS 200 and between BS 200. In this document, wireless communication / connections can be established via various RATs (e.g., 5G NR) such as UL / DL communication 150a, sidelink communication 150b (or D2D communication), or inter-BS communication (e.g., relay or integrated access backhaul (IAB)). Wireless signals can be transmitted and received between wireless devices, between wireless devices and BSs, and between BSs via wireless communication / connections 150a, 150b, and 150c. For example, signals can be transmitted and received via various physical channels via wireless communication / connections 150a, 150b, and 150c. For this purpose, at least a portion of the configuration information for configuring the process of transmitting / receiving wireless signals, various signal processing processes (e.g., channel coding / decoding, modulation / demodulation, and resource mapping / demapping), and resource allocation processes can be performed based on various proposals of this disclosure.

[0167] Examples of wireless devices that utilize this disclosure

[0168] Figure 7 A wireless device applicable to this disclosure is shown.

[0169] Reference Figure 7 The first wireless device 100 and the second wireless device 200 can transmit wireless signals via various RATs (e.g., LTE and NR). {The first wireless device 100 and the second wireless device 200} can correspond to... Figure 6 {Wireless Device 100x and BS 200} and / or {Wireless Device 100x and Wireless Device 100x}.

[0170] The first wireless device 100 may include one or more processors 102 and one or more memories 104, and also includes one or more transceivers 106 and / or one or more antennas 108. The processors 102 may control the memories 104 and / or the transceivers 106, and may be configured to implement the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed herein. For example, the processors 102 may process information in the memories 104 to generate a first information / signal, and then transmit a wireless signal including the first information / signal via the transceivers 106. The processors 102 may receive a wireless signal including a second information / signal via the transceivers 106, and then store the information obtained by processing the second information / signal in the memories 104. The memories 104 may be connected to the processors 102 and may store various information relating to the operation of the processors 102. For example, the memories 104 may store software code including instructions for performing all or part of the processing controlled by the processors 102 or for performing the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed herein. Processor 102 and memory 104 may be part of a communication modem / circuit / chip designed to implement RAT (e.g., LTE or NR). Transceiver 106 may be connected to processor 102 and transmit and / or receive wireless signals via one or more antennas 108. Each transceiver 106 may include a transmitter and / or a receiver. Transceiver 106 may be used interchangeably with a radio frequency (RF) unit. In this disclosure, the wireless device may be a communication modem / circuit / chip.

[0171] The second wireless device 200 may include one or more processors 202 and one or more memories 204, and also includes one or more transceivers 206 and / or one or more antennas 208. The processors 202 may control the memories 204 and / or the transceivers 206, and may be configured to implement the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed herein. For example, the processors 202 may process information in the memories 204 to generate third information / signals, and then transmit a wireless signal including the third information / signals via the transceivers 206. The processors 202 may receive wireless signals including fourth information / signals via the transceivers 206, and then store the information obtained by processing the fourth information / signals in the memories 204. The memories 204 may be connected to the processors 202 and store various information relating to the operation of the processors 202. For example, the memories 204 may store software code including instructions for performing all or part of the processing controlled by the processors 202 or for performing the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed herein. Processor 202 and memory 204 may be part of a communication modem / circuit / chip designed to implement RAT (e.g., LTE or NR). Transceiver 206 may be connected to processor 202 and transmit and / or receive wireless signals via one or more antennas 208. Each transceiver 206 may include a transmitter and / or a receiver. Transceiver 206 may be used interchangeably with an RF unit. In this disclosure, the wireless device may be a communication modem / circuit / chip.

[0172] The hardware elements of wireless devices 100 and 200 will now be described in more detail. One or more protocol layers may be implemented by (but not limited to) one or more processors 102 and 202. For example, one or more processors 102 and 202 may implement one or more layers (e.g., functional layers such as Physical (PHY), Medium Access Control (MAC), Radio Link Control (RLC), Packet Data Convergence Protocol (PDCP), RRC, and Service Data Adaptation Protocol (SDAP)). One or more processors 102 and 202 may generate one or more Protocol Data Units (PDUs) and / or one or more Service Data Units (SDUs) in accordance with the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document. One or more processors 102 and 202 may generate messages, control information, data, or information in accordance with the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document, and provide such messages, control information, data, or information to one or more transceivers 106 and 206. One or more processors 102 and 202 may generate signals (e.g., baseband signals) including PDUs, SDUs, messages, control information, data, or information, in accordance with the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document, and provide the generated signals to one or more transceivers 106 and 206. One or more processors 102 and 202 may receive signals (e.g., baseband signals) and acquire PDUs, SDUs, messages, control information, data, or information from one or more transceivers 106 and 206, in accordance with the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document.

[0173] One or more processors 102 and 202 may be referred to as controllers, microcontrollers, microprocessors, or microcomputers. One or more processors 102 and 202 may be implemented by hardware, firmware, software, or a combination thereof. For example, one or more application-specific integrated circuits (ASICs), one or more digital signal processors (DSPs), one or more digital signal processing devices (DSPDs), one or more programmable logic devices (PLDs), or one or more field-programmable gate arrays (FPGAs) may be included in one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document may be implemented using firmware or software, and the firmware or software may be configured to include modules, processes, or functions. Firmware or software configured to execute the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document may be included in one or more processors 102 and 202 or may be stored in one or more memories 104 and 204 and driven by one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document may be implemented using firmware or software in the form of code, instructions, and / or instruction sets.

[0174] One or more memories 104 and 204 may be connected to one or more processors 102 and 202 and store various types of data, signals, messages, information, programs, code, instructions, and / or commands. One or more memories 104 and 204 may be configured to include read-only memory (ROM), random access memory (RAM), electrically erasable programmable read-only memory (EPROM), flash memory, hard disk drive, registers, cache memory, computer-readable storage media, and / or combinations thereof. One or more memories 104 and 204 may be located internally and / or externally to one or more processors 102 and 202. One or more memories 104 and 204 may be connected to one or more processors 102 and 202 via various technologies such as wired or wireless connections.

[0175] One or more transceivers 106 and 206 may transmit user data, control information, and / or wireless signals / channels mentioned in the methods and / or operation flowcharts of this document to one or more other devices. One or more transceivers 106 and 206 may receive user data, control information, and / or wireless signals / channels mentioned in the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document from one or more other devices. For example, one or more transceivers 106 and 206 may be connected to one or more processors 102 and 202 and transmit and receive wireless signals. For example, one or more processors 102 and 202 may perform control to enable one or more transceivers 106 and 206 to transmit user data, control information, or wireless signals to one or more other devices. One or more processors 102 and 202 may perform control to enable one or more transceivers 106 and 206 to receive user data, control information, or wireless signals from one or more other devices. One or more transceivers 106 and 206 may be connected to one or more antennas 108 and 208, and one or more transceivers 106 and 206 may be configured to transmit and receive user data, control information, and / or radio signals / channels mentioned in the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document through one or more antennas 108 and 208. In this document, one or more antennas may be multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers 106 and 206 may convert received radio signals / channels from RF band signals to baseband signals for processing by one or more processors 102 and 202. One or more transceivers 106 and 206 may convert user data, control information, and radio signals / channels processed by one or more processors 102 and 202 from baseband signals to RF band signals. For this purpose, one or more transceivers 106 and 206 may include (analog) oscillators and / or filters.

[0176] Examples of the use of wireless devices applying this disclosure

[0177] Figure 8 Another example of a wireless device applied to this disclosure is shown. The wireless device can be adapted according to use cases / services (see reference). Figure 6 It can be realized in various forms.

[0178] Reference Figure 8 Wireless devices 100 and 200 can correspond to Figure 7The wireless devices 100 and 200 can be configured to include various elements, components, units / parts, and / or modules. For example, each of the wireless devices 100 and 200 may include a communication unit 110, a control unit 120, a memory unit 130, and an additional component 140. The communication unit 110 may include a communication circuit 112 and a transceiver 114. For example, the communication circuit 112 may include... Figure 7 One or more processors 102 and 202 and / or one or more memories 104 and 204. For example, transceiver 114 may include Figure 7 One or more transceivers 106 and 206 and / or one or more antennas 108 and 208. Control unit 120 is electrically connected to communication unit 110, memory 130, and add-on components 140, and provides overall control of the wireless device. For example, control unit 120 can control the electrical / mechanical operation of the wireless device based on programs / code / instructions / information stored in memory unit 130. Control unit 120 can transmit information stored in memory unit 130 to an external source (e.g., other communication devices) via communication unit 110 through a wireless / wired interface, or store information received from an external source (e.g., other communication devices) via communication unit 110 in memory unit 130 via a wireless / wired interface.

[0179] The add-on component 140 can be configured in various ways depending on the type of wireless device. For example, the add-on component 140 may include at least one of a power supply unit / battery, an input / output (I / O) unit, a drive unit, and a computing unit. The wireless device can be configured as (but is not limited to) a robot. Figure 6 100a), vehicles ( Figure 6 100b-1 and 100b-2), XR device ( Figure 6 100c), handheld device ( Figure 6 100d), home appliances ( Figure 6 100e), IoT devices ( Figure 6 100f), digital broadcasting terminals, holographic devices, public safety devices, MTC devices, medical devices, fintech devices (or financial devices), security devices, climate / environmental devices, AI servers / devices ( Figure 6 400), BS ( Figure 6 This can be achieved through methods such as 200 (network nodes, etc.). Depending on the usage / service, the wireless device can be mobile or fixed.

[0180] exist Figure 8In wireless devices 100 and 200, all elements, components, units / parts, and / or modules can be connected to each other via wired interfaces, or at least a portion thereof can be wirelessly connected via communication unit 110. For example, in each of wireless devices 100 and 200, control unit 120 and communication unit 110 can be wired connected, and control unit 120 and first units (e.g., 130 and 140) can be wirelessly connected via communication unit 110. The various elements, components, units / parts, and / or modules in wireless devices 100 and 200 may also include one or more elements. For example, control unit 120 may be configured using a collection of one or more processors. For example, control unit 120 may be configured using a collection of communication control processors, application processors, electronic control units (ECUs), graphics processing units, and memory control processors. In another example, memory 130 may be configured using RAM, dynamic RAM (DRAM), ROM, flash memory, volatile memory, non-volatile memory, and / or combinations thereof.

[0181] Examples of vehicles or autonomous vehicles that utilize this disclosure

[0182] Figure 9 The present disclosure illustrates a vehicle or autonomous vehicle. The vehicle or autonomous vehicle can be implemented as a mobile robot, car, train, manned / unmanned aerial vehicle (AV), boat, etc.

[0183] Reference Figure 9 The vehicle or autonomous vehicle 100 may include an antenna unit 108, a communication unit 110, a control unit 120, a drive unit 140a, a power supply unit 140b, a sensor unit 140c, and an autonomous driving unit 140d. The antenna unit 108 may be configured as part of the communication unit 110. Blocks 110 / 130 / 140a to 140d respectively correspond to... Figure 8 Blocks 110 / 130 / 140.

[0184] Communication unit 110 can send and receive signals (e.g., data and control signals) to and from external devices such as other vehicles, BSs (e.g., gNBs and roadside units), and servers. Control unit 120 can perform various operations by controlling the components of the vehicle or autonomous vehicle 100. Control unit 120 may include an ECU. Drive unit 140a enables the vehicle or autonomous vehicle 100 to travel on a road. Drive unit 140a may include an engine, motor, powertrain, wheels, brakes, steering mechanism, etc. Power supply unit 140b can supply power to the vehicle or autonomous vehicle 100 and includes wired / wireless charging circuitry, battery, etc. Sensor unit 140c can acquire information about vehicle status, surrounding environment, user information, etc. Sensor unit 140c may include inertial measurement unit (IMU) sensors, collision sensors, wheel sensors, speed sensors, slope sensors, weight sensors, heading sensors, position modules, vehicle forward / reverse sensors, battery sensors, fuel sensors, tire sensors, steering sensors, temperature sensors, humidity sensors, ultrasonic sensors, lighting sensors, pedal position sensors, etc. Autonomous driving unit 140d can implement technologies for maintaining the vehicle within its lane, technologies for automatically adjusting speed (e.g., adaptive cruise control), technologies for autonomously driving along a determined path, and technologies for automatically setting a route if a destination is set, etc.

[0185] For example, communication unit 110 can receive map data, traffic information data, etc., from an external server. Autonomous driving unit 140d can generate autonomous driving routes and driving plans from the acquired data. Control unit 120 can control drive unit 140a, enabling the vehicle or autonomous vehicle 100 to move along the autonomous driving route according to the driving plan (e.g., speed / direction control). During autonomous driving, communication unit 110 can acquire recent traffic information data from an external server non-periodically / periodically, and acquire surrounding traffic information data from nearby vehicles. During autonomous driving, sensor unit 140c can acquire information about vehicle status and / or surrounding environment. Autonomous driving unit 140d can update the autonomous driving route and driving plan based on newly acquired data / information. Communication unit 110 can transmit information about vehicle location, autonomous driving route, and / or driving plan to an external server. The external server can use AI technology to predict traffic information data based on information collected from the vehicle or autonomous vehicle, and provide the predicted traffic information data to the vehicle or autonomous vehicle.

[0186] Those skilled in the art will understand that this disclosure may be implemented in other specific ways besides those set forth herein without departing from the spirit and essential characteristics of this disclosure. Therefore, the above embodiments are to be construed as illustrative in all respects and not restrictive. The scope of this disclosure should be determined by the appended claims and their legal equivalents (rather than the foregoing description), and all changes falling within the meaning and scope of the appended claims are intended to be covered therewith.

[0187] Industrial applicability

[0188] As stated above, this disclosure applies to various wireless communication systems.

Claims

1. A method for transmitting and receiving signals by a user equipment (UE) in a wireless communication system, the method comprising the following steps: Receive (i) the configuration for discontinuous DRX reception operations for UE and (ii) the configuration for discontinuous DTX transmission operations and cell DRX operations for cell; as well as The UE receives downlink control information (DCI) based on the DRX operation, the DCI including a first field for activation and deactivation for the cell DTX and DRX operations. In addition to the active time based on the UE DRX operation, the first field is received together with the second field for the wake-up indication.

2. The method according to claim 1, wherein, During the active time based on the UE DRX operation, the first field is received without the second field.

3. The method according to claim 1, wherein, Outside of the active time based on the UE DRX operation, the DCI includes a first block and a second block, the first block including a first field for each of a plurality of UEs, and the second block including a second field. The first block is located after the second block.

4. The method according to claim 3, further comprising the following step: Receive first information regarding the location of the first block relative to the UE within the first block and second information regarding the location of the second block relative to the UE within the second block. Wherein, outside of the activity time based on the UE DRX operation, the position of the first block is derived based on the sum of the first information and the second information.

5. The method according to claim 1, wherein, The DCI is received via a monitoring time MO for a DCI format linked to the second field.

6. A user equipment (UE) for transmitting and receiving signals in a wireless communication system, the UE comprising: At least one transceiver; At least one processor; as well as At least one memory, operatively connected to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform a specific operation. The specific operations include: Receive (i) the configuration for discontinuous DRX reception operations for the UE and (ii) the configuration for discontinuous DTX transmission operations and cell DRX operations for the cell; and Based on the UE DRX operation, downlink control information (DCI) is received. The DCI includes a first field for activation and deactivation of the cell DTX and DRX operations. Outside of the active time based on the UE DRX operation, the first field is received together with the second field for the wake-up indication.

7. The UE according to claim 6, wherein, During the active time based on the UE DRX operation, the first field is received without the second field.

8. The UE according to claim 6, wherein, Outside of the active time based on the UE DRX operation, the DCI includes a first block and a second block, the first block including a first field for each of a plurality of UEs, and the second block including a second field. The first block is located after the second block.

9. The UE according to claim 8, wherein the specific operation further includes: Receive first information regarding the location of the first block relative to the UE within the first block and second information regarding the location of the second block relative to the UE within the second block. Wherein, outside of the activity time based on the UE DRX operation, the position of the first block is derived based on the sum of the first information and the second information.

10. The UE according to claim 6, wherein, The DCI is received via a monitoring time MO for a DCI format linked to the second field.

11. An apparatus for a user equipment (UE), the apparatus comprising: At least one processor; as well as At least one computer memory, operatively connected to the at least one processor and configured to, when executed, cause the at least one processor to perform operations, wherein the operations include: Receive (i) the configuration for discontinuous DRX reception operations for the UE and (ii) the configuration for discontinuous DTX transmission operations and cell DRX operations for the cell; and Based on the UE DRX operation, downlink control information (DCI) is received. The DCI includes a first field for activation and deactivation of the cell DTX and DRX operations. Outside of the active time based on the UE DRX operation, the first field is received together with the second field for the wake-up indication.

12. A computer-readable non-volatile storage medium comprising at least one computer program that causes at least one processor to perform operations, the operations including: Receive (i) the configuration for discontinuous DRX reception operations for UE and (ii) the configuration for discontinuous DTX transmission operations and cell DRX operations for cell; as well as Based on the UE DRX operation, downlink control information (DCI) is received. The DCI includes a first field for activation and deactivation of the cell DTX and DRX operations. In addition to the active time based on the UE DRX operation, the first field is received together with the second field for the wake-up indication.

13. A method for transmitting and receiving signals by a base station (BS) in a wireless communication system, the method comprising the following steps: Send (i) the configuration for discontinuous DRX reception by the UE and (ii) the configuration for discontinuous transmission of DTX and DRX operations by the cell; as well as Based on the UE DRX operation, downlink control information (DCI) is transmitted. The DCI includes a first field for activation and deactivation of the cell DTX and DRX operations. In addition to the active time based on the UE DRX operation, the first field is sent together with the second field for the wake-up indication.

14. A base station (BS) for transmitting and receiving signals in a wireless communication system, the BS comprising: At least one transceiver; At least one processor; as well as At least one memory, operatively connected to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform a specific operation. The specific operations include: Send (i) the configuration for discontinuous DRX reception by the UE and (ii) the configuration for discontinuous DTX transmission and cell DRX operations; and Based on the UE DRX operation, downlink control information (DCI) is transmitted. The DCI includes a first field for activation and deactivation of the cell DTX and DRX operations. Outside of the active time based on the UE DRX operation, the first field is sent together with the second field for the wake-up indication.

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